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Check for continuity between cell inputs, balance inputs, 3 V, 5 V, fused VBAT+ and fused VBAT-. All of these nets should be isolated from each other.
Connect the BMS carrier to the AFE isoSPI port A.
Power the BMS carrier board with 12 V.
Connect the AFE to 12 cells in series, OR connect a power supply between VBAT+ and VBAT-. The power supply can be set to about 30 V with a current limit of about 100 mA.
Measure the voltage between 3 V and VBAT-, and 5 V and VBAT-. 3 V will only be powered when the LTC6811 is awake, so the LTC6811 needs to receive valid ADC commands over isoSPI every 2 s or the REFON bit can be set to 1 with the WRCFGA command, and then the 3 V net can be measured with a DMM. Otherwise, an oscilloscope can be used to measure the 3 V net after a valid ADC command is sent.
Turn off the power supply.
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